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3 years ago

Pls help decide what i should type ..

Mathematics

1 answer:

Mashutka [201]3 years ago

3 0

1.) It snowed like it was the North Pole!

2.) We hit the beach and stayed all day.

3.) I had barrels of fun at the beach!

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If angle A measures 90 degrees and angles B and C measure 45 degrees and side AC measures 12 ft, find the length of side BC. Ple

kondor19780726 [428]

Since the angle are both 45 degrees, then you know that both legs are equal=12.
so to find the hypotenuse, you use the pythagorean theorem:

12^2+12^2= c^2
144+144=c^2
288=c^2
square root(144) x square root (2)=c
12 square root 2 is the answer, so D.

6 0

3 years ago

The Australian sheep dog is a breed renowned for its intelligence and work ethic. It is estimated that 30% of adult Australian s

m_a_m_a [10]

Answer:

0.15% probability that more than 7 of them weigh 65 lb

Step-by-step explanation:

For each dog, there are only two possible outcomes. Either they weigh 65 pounds, or more, or they do not. The probability of a dog weighing 65 pounds or more is independent of other dogs. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And p is the probability of X happening.

30% of adult Australian sheep dogs weigh 65 pounds or more.

This means that $p = 0.3$

Sample of 10 adults dogs.

This means that $n = 10$

What is the probability that more than 7 of them weigh 65 lb

This is

$P(X > 7) = P(X = 8) + P(X = 9) + P(X = 10)$

In which

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 8) = C_{10,8}.(0.3)^{8}.(0.7)^{2} = 0.0014$

$P(X = 9) = C_{10,9}.(0.3)^{9}.(0.7)^{1} = 0.0001$

$P(X = 10) = C_{10,10}.(0.3)^{10}.(0.7)^{0} \cong 0$

$P(X > 7) = P(X = 8) + P(X = 9) + P(X = 10) = 0.0014 + 0.0001 + 0 = 0.0015$

0.15% probability that more than 7 of them weigh 65 lb

7 0

3 years ago

What is the solution of the equation when solved over the complex numbers?<br><br> x^2+27=0

Luba_88 [7]

Answer:

(0,27)

Step-by-step explanation:

x2 + 27 = 0

Solutions based on quadratic formula:

= −0 − √ 02 − 4×1×27 2×1 = 0 − 6 × √ 3 i 2 ≈ −5.196152i

= −0 + √ 02 − 4×1×27 2×1 = 0 + 6 × √ 3 i 2 ≈ 5.196152i

Extrema:

Min = (0, 27)

8 0

3 years ago

Read 2 more answers

Determine the inverse function of f(x)=<img src="https://tex.z-dn.net/?f=%20%5Csqrt%7B4x-1%7D%20" id="TexFormula1" title=" \sqrt

gladu [14]

$f(x)=\sqrt{4x-1}\\
y=\sqrt{4x-1}\\
y^2=4x-1\\
4x=y^2+1\\
x=\dfrac{y^2+1}{4}\\
f^{-1}(x)=\dfrac{x^2+1}{4}\\$

7 0

3 years ago

Please explain step by step for 0.67÷0.3=?

pentagon [3]

Multiply each of the numbers by a ten to a power that they both become whole numbers.

0.67 * $10^2$ = 67
0.3 * $10^2$ = 30

Divide as usual.

67 / 30 = 2 $\frac{1}{3}$

So, the answer is 2 1/3.

3 0

3 years ago